Film developing apparatus



A. M. JANKosKl 2,402,250

FILM DEVELOPING APPARATUS Filed Sept. 5, 1944 5 Sheets-Sheet l June 1 8, 1946.

aofi. 'WP/W Jm1s,1946. A. M JANKOSK, www

FILM DEVELOP ING APPARATUS Filed Sept. 5, 1944 3 Sheets-Sheet 2 Inventor June 18,- w46. A M. JANKosKl 2,402,250

FILM DEVELOPING APPARATUS A IIIIII Patented June 18, 1946 UNITED STATES PATENT OFFICE FILM DEVELOPING APPARATUS Anthony M. Jankosk, Stanley, Wis.

Application September 5, 1944, Serial No. 552,734

2 Claims. (Cl. 95-905) My invention relates to improvements in film developing apparatus, thel primary object in View being to provide simply constructed, inexpensive means for use in developing roll film in a dark room, and which is especially designed for quick loading with roll iilm of different sizes, in substantially total darkness, without injuring such lm. y

Other and subordinate objects are also comprehended by my invention, all of which, together withk the precisey nature of my improve ments, will be readily understood when the succeeding description and claims are read with reference to the drawings accompanying and forming part of this specification.

In said drawings:

Figure l is a view in side elevation of my improved lm developing apparatus, in a preferred embodiment thereof,

Figure 2 is a view in plan,

Figure 3 is a view in vertical longitudinal section taken on the line 3-3 of Figure 2 and drawn to an enlarged scale,

Figure 4 is a view in horizontal section taken on the line 4 4 of Figure 3,

Figure 5 is a view in transverse section taken on the line 5 5 of Figure 3,

Figure 6 is a similar view taken on the line 6-6 of Figure 3,

Figure '7 is a view in perspective of the iilm holder inverted,

Figure 8 is a view in horizontal section taken on the line 8-8 of Figure 7,

Figure 9 isa similar view taken on the line 9-9 of Figure 7,

Figure 150 is a view in transverse section taken on-the line Ill-I0 of Figure 7,

Figure 11 is a view in perspective of a modied embodiment of lm holder,

Figure 12 is a view in transverse section taken on the line I2-I2 of Figure 11 and drawn to an enlarged scale,

Figure 13 is a detail view in perspective of the cover and holder illustrating the light baffle devices beneath the filler neck,

Figure 14 is a view in transverse section illustrating another modied embodiment of holder.

Referring to the drawings by numerals, and rst to Figures 1 to lOand 13, my invention. in the preferred embodiment thereof, comprises a tank I for containing a developing liquid, and a, iilm holder designated as a unit by the numeral 2, both of which will now be described in detail.

The tank I is of elongated, rectangular form and includes a bottom 3, sides 4, ends 5, and a removable cover panel 6. Reinforcing beads 1, 8 extend around the lower and upper edges of the tank, and the upper edge of said tank is provided with an external rabbet or groove S therein for seating a bottom edge flange I0 extending around the cover panel 6. Adjacent one end of the tank I and cover panel 6, said panel is :provided with a filler neck II having a funnel-shaped opening I2 therein. The opposite end of the tank I is provided in the upper edge thereof with a liquid overflow, or pouring, notch I3 therein, and the flange ID of the cover panel 6 is deepened at the corresponding end of the cover panel 6 to extend well down below said notch I3 to exclude light therefrom. Side cheek members I4 at said end of the cover panel 6 further prevents the light from entering said notch I3. A pair of transverse cleats I5 are provided on the bottom side of the cover panel 6 at opposite sides of the opening I2, respectively, and a single, similar cleat I6 adjacent to the opposite end of said cover panel 6 and directly opposite the notch I3. The function of the cleats I5, I6 will presently appear.

The holder 2 comprises a pair of opposed top and bottom lm holder bars Il, I8 of elongated, rectangular form and of requisite size to t in the tank I with sufficient clearance for easy removal of the same without binding. The opposed faces of the bars Il, I8 are rabbeted to provide a groove I9 therein extending along the side edges of the same from one end thereof and across the other end of the bars, the grooves I9 being designed to receive the edges 0f a roll lm `therein inserted as presently described in the holder from the mst-mentioned end of the bars II, I 8 constituting theA loading end of the holder. At said loading end of the holder I, the grooves I S on one side of said holder terminate in lateral ends ZIJ facilitating entering one end of a film laterally into the grooves I 9 in a manner which will presently be clear. A series of posts 2I of square cross section with iiaring heads 22 are suitably attached to the top bars I1 in the longitudinal center thereof, one adjacent to each' end of said bar and the other in the transverse center of the bar, and which are slidably extended through similarly shaped sockets 23 extending through the bottom bar IB and through square reinforcing bosses 24 suitably xed on the bottom face of said bottom bar I8. The bosses 24 are each provided with a transverse aperture 25 therein extending from side to side thereof and the posts 2I are each provided with a series of longitudinally spaced similar apertures 26 therein. Pins through the opening I2 when the cover panel Ii- The cleats I6 before mentioned are is in place.

designed to coact with the top bar Ill-to function v similarly as regards preventing ligh't from entering the tank I through the notch I3. lThe:`

cleats I5, I6 and 28 also act as splash guards preventing liquid from escaping from the tank I through the opening I2 and the notch I3 in h'andling of the apparatus. The described posts 2I are designed to rest on the bottom of thetank I and support the top-bar Il of the holder 2 at a level for engagement of the cleats 28 by the cover panel 6 and engagement ofthe cleats I5, I 6 by the top bar I'I. v

The manner in which the described invention is designed to be used and operated will be readily understood. The holderY 2 having been adjusted, as regards the bars Il, I8, in the manner already described, to accommodate in theV grooves IS aroll film of the width which it is desired to develop, the film is loadedinto the holder 2 by entering oneiend laterally` into the ends 20ct the grooves I9, then pulling said Vend of the film along the groove I 9. y As will be seen, under such pull-on said end the holder vbecomes self-loading. It will, of course, .be understood thatv the holder 2, likewise the tank I, is designed as regards the length for the development of roll films of maximum length. With 'the film loaded into the holder 2 in the-manner described and illustrated at Sli in Figure l0, the holder and lm are next inserted in the tank I and the cover panels applied to close said tank. The developer liquid may then be poured into the tank I through the neck II, until overflow through notch I3 advises that said tank is full. The manner in which the iilm 35i is unloaded will be manifest from the description of the way in which it is loaded into the holder. As has been previously explained, 'the posts 2| are designed to seat on the bottom 3 of the tank I. Therefore, regardless of the adjustment of `the bars I1, I8, the top4 bar I'I is always spaced from the cover panel 6 in the manner pre viously described for proper functioning of the cleats I5,y I6, 28 in the manner already set forth.

As shown in Figures 11 and 12,` my invention comprehends a modified embodiment of holder 3l which has the form of a channel member embodyng a pair of opposed top and bottom longitudinal edge flanges 32, 33 provided in the opposed faces thereof with upper and lower longitudinal grooves 34, 35 which, at one end of the holder 3I, open laterally, as at 3B, onto theside edges of the fianges 32, 33. This form of holder 3l is designed for use with short length films of uniform width which are inserted into the grooves 34, 35 by way of the laterally opening ends 36 in a manner which will be readily apparent from the description of the preferred embodiment of the invention.

In the modied embodiment of holder shown in scribed with reference to Figures 11 and 12, with the exception that the holder is of duplex form with film holding grooves 31 arranged in complemental pairs at opposite sides of the holder. This form of holder may be used to support a double load of short length films, as will be clear.

The foregoing will, it is believed, suficeto impart a clear understanding of my invention with-V out further explanation.

-Manifestly, the invention, as described, is susceptible of modification without departing from the inventive concept, and right is herein reserved to such modifications as fall within the scope of the appended claims.

.Whatlclaimisz 1. In apparatus for use in developing roll film, a developing tank having an overflow recess therein, a cover panel having a filling. neck therein, a filmy holder removably tted in said tank, and coacting baille devices on said cover panel and holder for obstructing the entrance of light into the tank by way of said neck and recess, respectively, constructed andv arranged to act as splash guards preventing the escape of developer from the tank out of said neck and recess, said holder including a top bar spaced from saidvpanel, said devices comprising cleats on said bar, and cleats on said panel.

2. In apparatus for developing roll films, an elongated rectangular developer tank, a cover panel fitting over said tank, a lm holder removably tted into said tank and including an elongated top bar, a filler neck on said panel adjacent one end thereof, and coacting baiile devices on said panel and bar for obstructing-the entrance of light into the tank through the` filler neck comprising a pair of transverse .cleats on thebottom of said panel upon oppositesides of said filler neck, respectively, and a pair of spacedapart angular cleats on top of said bar extending along the sides thereof and crosswise of the bar in surrounding relation tothe cleats first mentioned and being spaced apart to permit .the developer to-pass between the same. s

ANTHONY M. ,JANKOSKL 

